1/ #ThreatHunting:
In a compromised network, we saw the following request in the proxy logs:
www.advanced-ip-scanner[.]com/checkupdate.php?[..]
This scanner is trendy among ransomware groups and has been mentioned in reports by @The DFIR Report, among others. [1] 
2/ This HTTP request can now be used very well for an alert. Or better, collect and monitor all your DNS logs, because a DNS request will still go out if the Advanced IP Scanner is run without an installation (portable version). An excellent opportunity for detection.
3/ You can see the DNS request for the domain www.advanced-ip-scanner[.]com below.
4/ DFIR Tip:
Inside the registry (HKCU\Software\Famatech\advanced_ip_scanner\State) we can find interesting forensic artifacts like the last scanned range. 
Reference:
[1] twitter.com/TheDFIRReport/…
The DFIR Report@TheDFIRReport
@TheDFIRReport
Diavol Ransomware
Initial Access: Zip->ISO loading BazarLoader
Discovery: Net, Ping, AdFind, Advanced IP Scanner, ShareFinder
C2: #CobaltStrike & #BazarLoader
Lateral Movement: RDP, AnyDesk
Exfil: FileZilla, ufile
Impact: Diavol ransomware
thedfirreport.com/2021/12/13/dia…
Stephan Berger
@malmoeb
Head of Investigations @InfoGuardAG • #DFIR • Threat Hunting • Azure & Active Directory Fanboy • OSCP, GXPN, GCIA, GCFA, GSE
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